Leases (Lease Assets and Liabilities) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 7,024,000
Document Period End Date	Sep. 30, 2019
Assets
Operating lease assets	$ 107,906,000
Finance lease assets	12,451,000
Total leased assets	120,357,000
Current
Operating lease liabilities	34,179,000
Finance lease liabilities	1,229,000
Long-term
Operating lease liabilities	76,390,000
Finance lease liabilities	14,840,000	$ 16,140,000
Total lease liabilities	$ 126,638,000